To perform these tests, we use a high-speed camera that shoots at 1000 frames per second. Analyzing the video frame-by-frame allows us to observe the exact time it takes to go from a zero-percent signal to a 100% white field.
The pattern generator is placed at the base of the monitor so our camera can capture the precise moment its front-panel LED lights up, indicating that a video signal is being received by the monitor. With this camera placement, we can easily see how long it takes to fully display a pattern after pressing the button on the generator’s remote. This testing methodology allows for accurate and repeatable results when comparing panels.
Here’s a shot of our test setup. Click on the photo to enlarge.
The brighter section of the camera’s screen is what appears in the video. You can see the lights of the pattern generator in the bottom of the viewfinder. We flash the pattern on and off five times and average the results.

Twenty-five milliseconds is the typical result we get from almost every IPS panel we benchmark. Until we have a chance to measure a higher-refresh capable display, it seems that the technology has made no progress toward improving pixel response.
Here are the lag results:

Serious gamers will probably look for better input lag performance. But among 60 Hz IPS screens, the 34UM95 acquits itself well. Only the TN-based panels can beat it in our current group. Compared to other IPS displays, it’s one of the fastest products we’ve seen.
And for those of you wondering about the Overlord Tempest X270OC, we have one in the lab and its review will be published very soon.
Usability Testing
With so much screen area available, LG thoughtfully includes an app that automatically sizes Windows (it works on Macs too) into user-definable screen zones. The photo above shows a four-window configuration, though you can use other layouts as well, demonstrated in the screenshot below.
Once you select an option, windows dragged to a particular area automatically size themselves to fill that zone. You can arrange your apps very quickly this way.
With or without the Screen Split utility, LG's 34UM95 is a pleasure to use. I debate the multi-monitor configuration on and off for my own workstation, but haven't pulled the trigger. I'm well-adapted to a single 27-inch QHD display. So, a 34-inch ultra-wide would give me an extra 7.75 inches of width versus what I already use.
For gaming, this certainly won’t replicate a three 24" monitors in Eyefinity or Surround. But if you're a casual like myself, the extra width creates a more immersive experience. From 30 inches away, the sides of the screen are just within my peripheral vision. In fast-paced titles, I do actually turn my head a little as action pans horizontally. Vertically, I don’t think I’d be comfortable with any more height. Of course, your mileage may vary.
In my opinion, the 34-inch diagonal size is ideal for a single ultra-wide monitor. Since the pixel density is identical to QHD’s 109 PPI, there is no difference in font size or perceived resolution.
- LG 34UM95 34-Inch Ultra-Wide QHD Monitor Review
- Packaging, Physical Layout, And Accessories
- OSD Setup And Calibration Of The LG 34UM95
- Measurement And Calibration Methodology: How We Test
- Results: Brightness And Contrast
- Results: Grayscale Tracking And Gamma Response
- Results: Color Gamut And Performance
- Results: Viewing Angles And Uniformity
- Results: Pixel Response, Input Lag, And Usability
- LG 34UM95: Solid Performance And Real Usability



Playing on "full" hd (LD? Low definition) feels like a joke once you get to know uhd/4k
With regards to this monitor...I LOVE the looks...very elegant. I think the price tag is fitting as well - it has great resolution and there are still plenty of people who are gaming on 60hz displays that may have just enough GPU power to actually game at this thing's native resolution, albeit with slightly lower settings. GG LG!
Next
It would have been nice to include what revision this is, because LG is aware of uniformity issues, which is why the product was largely on backorder and a Rev.2 is in place (but Rev. 2 didn't fix the problem either). My first one had a glaring Uniformity problem, but LG is cool and offered an advanced exchange. The new one has some uniformity problem, but it is very 'livable' and discrete.
Overall, I am pleased with this product. I have a single 780 to push this and it works nicely. If I got a 4k monitor, I'd have performance issues as the GPU as a whole sector is behind.
seriously though, pc monitors have been lacking for some years now, falling behind in innovation and technology in general(phones have been jacking up their screen quality year after year, we've been stuck since like 2005). i bet 21:9 screens will have the biggest penetration on PCs.
This is simply a horrible aspect ratio for most people.
The problem is that if you can see the entire monitor without moving your head then 16:9 is the proper ratio to maximize viewing area such as 3840x2160.
Ultrawide really only makes sense if it's WIDER than what you can see without moving your head. For that, I'd rather have more than one monitor.
Ultrawide for gaming makes little sense. Screens need to be curved, or have multiple angled monitors with minimal gap but a single super-wide screen just doesn't work.
*If you really think about it, it's hard to justify the 21:9 ratio.
This is simply a horrible aspect ratio for most people.
The problem is that if you can see the entire monitor without moving your head then 16:9 is the proper ratio to maximize viewing area such as 3840x2160.
Ultrawide really only makes sense if it's WIDER than what you can see without moving your head. For that, I'd rather have more than one monitor.
Ultrawide for gaming makes little sense. Screens need to be curved, or have multiple angled monitors with minimal gap but a single super-wide screen just doesn't work.
*If you really think about it, it's hard to justify the 21:9 ratio.
Don't knock it, if you haven't tried it. Seen the demos of this screen with 21:9, it's quite impressive looking, compared to the other ratios out there. At the very least, it's more compelling than given credit for.
Impressive LOOKING and impressive FUNCTIONALITY are two different things
That's what I'm thinking. It seems like the wider the screen resolution the more perceivable tearing is. G-sync would help this situation. Acer is supposed to be releasing a 4K G-sync monitor in the next 6 months or so:
http://www.geforce.com/whats-new/articles/nvidia-g-sync-monitors-unveiled-shipping-soon-worldwide
Granted the 34" will have its uses and applications, but from the UWHD I don't think it will be the most sold. the 27" might be too small, but 29" is perfect for 2650x1080. BTW, I do game in this monitor too, and I work on it TOO